C3′s current big data software platform collects disparate data about buildings, energy generation and energy consumption from a variety of places like publicly-available data scraped from the web, utilities’ energy use info from its customers, and weather data from weather information companies. For PG&E, C3 aggregated at least 8 terabytes of data, which C3 normalized and loaded at 5 million records an hour. The data product helped PG&E do a year’s worth of energy audits on the commercial and industrial buildings in its footprint, said Siebel at DistribuTECH.

C3 plans to launch another five projects like this in 2013 and another five in 2014, and its other customers include Entergy, Northeast Utilities, Constellation Energy, NYSEG, Integrys Energy Group, Southern California Edison, ComEd, Rochester Gas & Electric, and DTE Energy.

Silver Lake Kraftwerk is private equity firm Silver Lake Kraftwerk’s clean energy growth fund, and it has a thesis to invest in later stage growing clean energy, waste and other types of cleantech companies. The fund, which also is looking to invest aggressively internationally, has raised at least $350 million, though I’ve heard the fund is closer to having raised $600 million at this point. Silver Lake Kraftwerk has invested in a later round in SolarCity (before it went public) and German recycled plastics processing and manufacturing company Friedola Tech.

Zoi spoke at our Green:Net event back in 2011. She also joined the Board of Makani Power, the high altitude wind power startup in Alameda, Calif.